Detailed luminescence modelling in high-efficiency solar cells for precise calibration of spatially resolved characterisation methods

ǂa ǂbottom-up opto-electrical approach

Miha Kikelj (Author), Matevž Bokalič (Author), Marko Topič (Author), Benjamin Lipovšek (Author)

Abstract

In the scope of solar cell characterisation, spatially resolved imaging (SRI) methods (EL, PL and LBIC) have long been a standard procedure for valuable in-depth evaluation and extraction of various spatially resolved material properties, especially those related to the electrical behaviour. While this extraction can be straightforward in the case of laterally homogeneous devices, the situation is vastly different when the structural features are laterally varying, such as in the case of interdigitated back contact (IBC) solar cells. We show that in the case of laterally varying devices inherent device optical properties play a far more important role in determining the measured profile in this case and may indeed overshadow any underlying electrical effects. We therefore propose and validate a methodology that couples SRI characterisation with advanced bottom-up simulation of IBC solar cells. The method fully accounts for lateral device variability and allows for accurate extraction of the underlying electrical phenomena. We demonstrate the applicability of the method on state-of-the-art high-efficiency IBC solar cells, and explain the key factors, which could lead to misinterpretation of the results obtained solely by SRI measurements.

Keywords

prostorska slikovna karakterizacija;elektroluminiscenca;optične simulacije;električne simulacije;sončne celice z izmenjujočimi kontakti na zadnji strani;spatially resolved imaging;electroluminescence;optical simulation;electrical simulation;interdigitated back-contact solar cells;

Data

Language:	English
Year of publishing:	2022
Typology:	1.01 - Original Scientific Article
Organization:	UL FE - Faculty of Electrical Engineering
UDC:	621.383.51
COBISS:	121928195
ISSN:	0927-0248
Views:	23
Downloads:	4
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	prostorska slikovna karakterizacija;elektroluminiscenca;optične simulacije;električne simulacije;sončne celice z izmenjujočimi kontakti na zadnji strani;
Type (COBISS):	Article
Pages:	str. 1-11
Volume:	ǂVol. ǂ248
Issue:	111990
Chronology:	Dec. 2022
DOI:	10.1016/j.solmat.2022.111990
ID:	17687992